What is an inspection body for a fire detection installation?
An inspection body is a structure independent of the installer, responsible for verifying that a fire detection installation complies with standard NBN S 21-100-1 before its final commissioning. In Belgium, this role is most often performed by a BOSEC-certified body or by a technician accredited according to standards recognized by ANPI, two benchmarks that emergency zones commonly accept in a safety file.
Independence is the central point: the inspection body has not laid the cables nor programmed the control panel; it verifies the work of a third party. This separation between the one who installs and the one who inspects gives the acceptance report a value that the installer's self-inspection, however rigorous, cannot have alone in the eyes of the competent fire service.
How does the technical acceptance procedure work?
The technical acceptance follows a precise sequence, carried out after the end of the construction work and before the building is put into operation. It takes place in several stages.
- 1.Documentary verification: installation plans, detection zone diagrams, control panel manual, BOSEC sheets for installed equipment.
- 2.Visual inspection of the installation: detector positioning, accessibility, signage, wiring and electrical supplies.
- 3.Functional tests detector by detector and zone by zone, with verification of alarm transmissions and, where applicable, interlocks (smoke extraction, compartmentation).
- 4.Verification of backup power supply and control panel behavior in case of fault or mains failure.
- 5.Drafting of the acceptance report, with a record of any non-conformities and deadline for compliance.
- 6.Transmission of the report to the operator, who includes it in the file for the emergency zone.
This procedure is distinct from the periodic inspection organized according to NBN S 21-100-2, which subsequently applies to the installation in operation.
What is the difference between the installer's self-inspection and acceptance by an inspection body?
Self-inspection is the verification that the installer carries out themselves, during and just after the construction work, to ensure that their own work functions. Acceptance by an inspection body is an independent verification, carried out by a third party, whose report involves a different responsibility than that of the installer.
| Aspect | Installer's self-inspection | Acceptance by inspection body |
|---|---|---|
| Who performs it | The company that installed the system | An independent structure, often BOSEC-certified |
| When | During and at the end of construction | After completion of work, before commissioning |
| Reference standard | Project specifications | NBN S 21-100-1 |
| Document produced | Internal commissioning sheet | Technical acceptance report |
| Value for the emergency zone | Not sufficient alone | Expected document in the file |
Both approaches are complementary: self-inspection prepares for acceptance, it does not replace it.
What does the acceptance report required by emergency zones contain?
The acceptance report is the document that the emergency zone requests to verify that a fire detection installation has been inspected by a third party before commissioning. It contains the building identification and its category according to the Royal Decree of 7 July 1994 (low, medium or high-rise building), the description of the control panel and detection zones, as well as the number and type of detectors installed.
It also includes the results of functional tests carried out zone by zone, the list of non-conformities found with their resolution deadline, the certificate of compliance with NBN S 21-100-1, and the contact details of the inspection body and installer. The report finally indicates the deadline for the first periodic inspection, subsequently carried out according to NBN S 21-100-2. Without this document, the emergency zone may refuse to approve the building's commissioning.
When must a complete technical acceptance be redone?
A complete technical acceptance must be redone whenever a substantial modification affects the fire detection installation: building extension, addition of detection zones, replacement of the control panel, or change in room use that modifies the building category within the meaning of the Royal Decree of 7 July 1994.
This complete acceptance is distinct from the periodic inspection organized according to NBN S 21-100-2, which applies to an already accepted and operational installation, without modification of its initial design. An operator who has part of their control panel replaced or who adds a wing to their building cannot simply rely on a standard periodic inspection: the modified part must undergo a proper technical acceptance again, with a new report transmitted to the emergency zone.